Pickling apparatus



Feb. 23, 1937. A, DIETZEL PICKLINGAPPARATUS lFiled May ll, 1936 v Y. INVENTQR BYg Patented Feb. 23, 1937 muren stares PATENT' ori-"ICE` 2 Claims.

My invention relates to pickling tanks, and is directed to means for controlling the drain of such a tank, and for holding a circulating bath of pickling acid at predetermined level in the 5 tank. More specifically the invention consists in particular renements and elaborations in structure of a valve-controlled stand-pipe, and in the particular organization of such stand-pipe With a pickling tank.

An embodiment of the invention is illustrated in the accompanying drawing in which Fig. I is a fragmentary View oi a pickling tank, showing in vertical section my valve-controlled stand-v pipe assembled with the drain of the tank; and 15 Fig. II is a sectional View of the stand-pipe, taken in the plane II-II of Fig. I.

In the drawing the reference numeral I is applied to a pickling tank, which in this case (and in known way) is constructed of acid resisting o masonry. A vertical stand-pipe 2 is mounted adjacent the side wall of the tank, and is connected to the usual drain 3 of the tank by means oi a flange-d union 4. Advantageously, the standpipe is constructed in a plurality of sections, and

25 in this case it comprises a valve body portion 2a and a stand-pipe portion 2b. Both of such porA tions are constructed of (or lined with) such material as will resist hydrochloric or sulphonic acid, and, advantageously, I form the two por- 30 tions of lead. The valve portion 2a consists of a single casting including a horizontally extending valve-seat 5. The body 2a includes above the valve-seat an inlet 6 communicating with the drainage passage 3 extending from adjacent 35 the bottom of the tank, as shown. And beneath the valveseat an outlet 'I opens into a sewer 8 extending substantially at right angles to the valve body, although it is contemplated that in some cases the outlet 'I may be provided in the 40 immediate bottom of the valve body and connected to a vertical sewer drain.

The top o1" Valve body 2a is open and receives the lower end of stand-pipe portion 2b, and the members 2a, 2b are united, say by soldering,

45 Welding, or lead-burning. Above the valveseat 5, the integrated members 2a, 2b provide a continuous stand-pipe bore A.

A valve is arranged normally to close the bore A at its base, and, advantageously, the valve 50 consists in a rubber sphere 9 engaging the valveseat 5 in the manner illustrated. The rubber sphere 9 is secured to the lower end of a rod I0 that extends axially through bore A, and, projecting through stand-pipe cover II, terminates 55 externally of the stand-pipe structure in a handle I2. The rubber valve 9 is, inherently, resistant to acid, and the valve-rod I0 may be constructed of acid-resisting metal, or of a plain steel coated with lead or rubber.

It will be observed that the acid of the bath B in tank I, by virtue of passage 3, 6, enters the bore A of the structure, and normally stands therein at equal level with the surface of the bath. It is desirable to maintain the surface of the bath B at substantially constant level, and thus it is that, when new acid is introduced to fortify the bath in service, a portion of the bath must be drained away. This drainage of surplus acid is automatically effected by means of an overflow orice I3 in the stand-pipe structure. As shown in Fig. II a duct IA-say of acid resisting lead pipe-is mounted externally of the assembled member 2a, 2b. The duct extends from overiiow orice I3 to a port I5 opening beneath the valve seat 5, and it will be manifest that such structure is adapted to maintain the surface of the acid bath B at desired level, the vertical position of orifice I3 being determined with this end in view. Of course, when it is desired to drain the tank, the valve 9 is raised and held from its seat by means of valve-rod I0, whereby the outowing acid flows immediately into the drain 8. The vapors rising from the flowing acid are confined within the stand-pipe structure, and, therefore, are prevented from rising into the open atmosphere in objectionable manner.

It will be understood that various modifications of the embodiment of the invention described may be made Without departing from the invention dened in the ensuing claims.

I claim as my invention:

l. In combination; a tank having acid-resisting door and side walls and adapted to contain a bath of pickling acid into which quantities of fortifying acid are introduced and circulated, as described; means for normally maintaining said circulated bath at predetermined level in said tank and for occasionally draining the tank, said means comprising a stand-pipe mounted externally of and adjacent to the side wall of said tank, said stand-pipe being constructed of acidresisting material an-d including adjacent its base a'valve-seat, a passage extending from the bottom region of said tank and opening into said stand-pipe on one side of said valve-seat and a drain opening on the opposite side of said seat,

pursuant upon the fortification of said bath, acid ows through said passage at the bottom of the tank and rises in and escapes from said standpipe in such manner as to maintain the circulated bath at desired level in the tank, a Valve normally resting on said seat and closing communication between said passage and said drain, and a Valve-operating rod extending upward in said stand-pipe.

2. The structure of claim 1, in which said stand-pipe structure comprises an integral cast body of acid-resisting material including said valve-seat, a preformed pipe of acid-resisting material assembled With said cast-body and providing in association therewith a stand-pipe extending upward from said valve-seat, and a preformed tube of acid-resisting material rigidly assembled externally upon said assembled cast body and preformed pipe and providing said duct.

ALBERT DIETZEL. 

